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RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a Hardware Description Contents 6.4.6.5 RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a Hardware Description 6.4.6.5.1 Changes in RRU5901&RRU5901w&RRU5301 (2.6G)&RRU3971a Hardware Description 6.4.6.5.2 RRU Introduction 6.4.6.5.2.1 RRU Exterior 6.4.6.5.2.2 RRU Functions 6.4.6.5.2.3 RRU Technical Specifications 6.4.6.5.2.4 RRU Ports 6.4.6.5.2.5 RRU Indicators 6.4.6.5.2.6 Optical Modules 6.4.6.5.3 RRU Cables 6.4.6.5.3.1 RRU Cable List 6.4.6.5.3.2 RRU PGND Cable 6.4.6.5.3.3 RRU Power Cable 6.4.6.5.3.4 CPRI Fiber Optic Cable 6.4.6.5.3.5 RRU RF Jumper 6.4.6.5.3.6 RRU AISG Multi-Wire Cable 6.4.6.5.3.7 RRU AISG Extension Cable 6.4.6.5.4 RF Cable Connections for the RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a 6.4.6.5.5 RRU Auxiliary Devices

6.4.6.5 RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a Hardware Description Purpose This document provides reference for planning and deploying a DC blade RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a (referred to as RRU in this document). RRU is short for remote radio unit. It presents the exterior and describes the ports, functions, cable types, connector specifications, and cable connections of the RRU.

Product Versions The following table lists the product versions related to the RRU. Product Name

RRU5901

Solution Version   

SRAN10.1 and later versions GBSS17.1 and later versions eRAN8.1 and later versions

Product Version

V100R010C10 and later versions For details about the software versions of RF modules, see Software and Hardware Compatibility Description.

5G RAN1.0 and later versions V100R013C10 and later versions For details about the software versions of RF modules, see Software and Hardware Compatibility Description. RRU5901w

  

RRU5301 (2.6G)

 

RRU5301 (1.4G)

 

RRU3971a

 

SRAN11.1 and later versions GBSS18.1 and later versions eRAN11.1 and later versions

V100R011C10 and later versions For details about the software versions of RF modules, see Software and Hardware Compatibility Description.

SRAN11.1 and later versions eRAN11.1 and later versions

V100R011C10 and later versions For details about the software versions of RF modules, see Software and Hardware Compatibility Description.

SRAN12.1 and later versions eRAN12.1 and later versions

V100R012C10 and later versions For details about the software versions of RF modules, see Software and Hardware Compatibility Description.

SRAN10.1 and later versions GBSS17.1 and later versions

V100R010C10 and later versions For details about the software versions of RF modules, see

Product Name

Solution Version 

Product Version

eRAN8.1 and later versions Software and Hardware Compatibility Description.

Intended Audience This document is intended for: 

Base station installation engineers



System engineers



Site maintenance engineers

Organization Changes in RRU5901&RRU5901w&RRU5301 (2.6G)&RRU3971a Hardware Description

This section describes the changes in RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a Hardware Description. RRU Introduction

This chapter describes the exterior and function of the RRU as well as the ports and indicators on the RRU. RRU Cables

This chapter describes RRU cables. RF Cable Connections for the RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a

RF cable connections for the RRU vary depending on the configurations of the RRU and antenna. RRU Auxiliary Devices

This chapter describes RRU auxiliary devices. Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd.

6.4.6.5.1 Changes in RRU5901&RRU5901w&RRU5301 (2.6G)&RRU3971a Hardware Description This section describes the changes in RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a Hardware Description.

06 (2019-04-30) This is the sixth official release. Compared with Issue 05 (2018-08-25), this issue does not include any new information. Compared with Issue 05 (2018-08-25), this issue includes the following changes. Topic

Change Description

the whole document

Added information about the RRU5301 (1.4G).

Compared with Issue 05 (2018-08-25), no information is deleted from this issue.

05 (2018-08-25) This is the fifth official release. Compared with Issue 04 (2018-03-30), this issue does not include any new information. Compared with Issue 04 (2018-03-30), this issue includes the following changes. Topic

Change Description

RRU Power Cable

Modified the specifications of an RRU power cable.

Compared with Issue 04 (2018-03-30), no information is deleted from this issue.

04 (2018-03-30) This is the fourth official release. Compared with Issue 03 (2018-01-20), this issue does not include any new information. Compared with Issue 03 (2018-01-20), this issue includes the following changes. Topic

Change Description

The whole document

Added information about the RRU5901w and RRU3971a.

Compared with Issue 03 (2018-01-20), no information is deleted from this issue.

03 (2018-01-20) This is the third official release. Compared with Issue 02 (2017-09-30), this issue does not include any new information.

Compared with Issue 02 (2017-09-30), this issue includes the following changes. Topic

Change Description

The whole document

Added information about the RRU5301.

Compared with Issue 02 (2017-09-30), no information is deleted from this issue.

02 (2017-09-30) This is the second official release. Compared with Issue 01 (2017-06-15), this issue does not include any new information. Compared with Issue 01 (2017-06-15), this issue includes the following changes. Topic

Change Description

About This Document

Updated the required product versions and added support of the RRU by the DBS5900.

Compared with Issue 01 (2017-06-15), no information is deleted from this issue.

01 (2017-06-15) This is the first official release. Compared with Draft A (2017-03-30), this issue does not include any new information. Compared with Draft A (2017-03-30), this issue includes the following changes. Topic

Change Description

RRU Functions RRU Auxiliary Devices

Added descriptions of the OPM50M(Ver.B).

Compared with Draft A (2017-03-30), no information is deleted from this issue.

Draft A (2017-03-30) This is a draft. Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd.

6.4.6.5.2 RRU Introduction

This chapter describes the exterior and function of the RRU as well as the ports and indicators on the RRU. RRU Exterior

This section describes the exterior and dimensions of an RRU. RRU Functions

This section describes main functions of an RRU. RRU Technical Specifications

This section describes technical specifications of an RRU, including supported modes, frequency bands, RF specifications, engineering specifications, and antenna capabilities. RRU Ports

This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. RRU Indicators

This section describes six indicators on an RRU. They indicate the running status of the RRU. Optical Modules

An optical module transmits optical signals between an optical port and an optical fiber. Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd.

6.4.6.5.2.1 RRU Exterior This section describes the exterior and dimensions of an RRU. Figure 1

shows the exterior of an RRU.

Figure 1 RRU exterior

Figure 2

shows RRU dimensions.

Figure 2 RRU dimensions

You can obtain the RRU name, RRU frequency band and power supply information from the nameplate on the cover plate. Figure 3 shows the positions of the nameplate on the RRU. NOTE: The actual nameplate may differ from what is shown in the figure.

Figure 3 Positions of the nameplate

(1) Nameplate

(2) Module name

(3) Frequency band

(4) Power supply type

Parent Topic: RRU Introduction Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. Next topic >

6.4.6.5.2.2 RRU Functions This section describes main functions of an RRU. The Remote Radio Unit (RRU) consists of the high-speed interface unit, signal processing unit, power amplifier, duplexer, extension ports, and power module. Figure 1

shows the functional structure of the RRU.

Figure 1 Functional structure of an RRU

NOTE: For details about the extension ports, see RRU Ports.

The RRU performs the following functions: 

Receives downlink baseband data from the BBU and sends uplink baseband data to the BBU.



Receives RF signals from the antenna system, down-converts the signals to intermediate frequency (IF) signals, amplifies the IF signals, performs analog-to-digital conversion, and up-converts RF signals to the transmit (TX) band.



Multiplexes receive (RX) and TX signals on the RF channel so that these signals can share the same antenna channel, and filters the RX and TX signals.



Provides a built-in Bias Tee (BT). Besides receiving and transmitting RF signals, RRU RF ports A and B transmit OOK signals to antennas through the built-in BT. The RF ports A, B, C, and D also supply DC power to the tower mounted amplifier (TMA).



The RRU can work with the Monitoring Extension Box (MEB). The MEB can transmit external RS-485 communication signals and dry node monitoring signals into the RRU, implementing information monitoring and reporting. For details about the MEB, see MEB06D User Guide.



When an RRU is equipped with an AC/DC power module, the RRU and the power module together are called an AC RRU. For details about the AC/DC power module, see OPM15M(Ver.B) User Guide or OPM50M(Ver.B) User Guide.

Parent Topic: RRU Introduction

Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.2.3 RRU Technical Specifications This section describes technical specifications of an RRU, including supported modes, frequency bands, RF specifications, engineering specifications, and antenna capabilities. For details about technical specifications of an RRU, see section Technical Specifications of RRUs in the RRU Technical Specifications. Parent Topic: RRU Introduction Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.2.4 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Figure 1

shows the ports on the RRU panels.

Figure 1 Ports on the RRU panels

Table 1

describes ports and indicators on the RRU panels.

Table 1 Ports and indicators on the RRU panels Item

Silkscreen

Remarks

(1) Bottom ports

A T/R

TX/RX port A (4.3-10 female connector), supporting RET signal transmission

C T/R

TX/RX port C (4.3-10 female connector)

D T/R

TX/RX port D (4.3-10 female connector)

Table 1 Ports and indicators on the RRU panels Item

(2) Ports in the cabling cavity

(3) Indicator

Silkscreen

Remarks

B T/R

TX/RX port B (4.3-10 female connector), supporting RET signal transmission

RET

Communication port for the RET antenna, supporting RET signal transmission

RTN(+)

Power supply socket, For details about RRU power cable appearance and specifications, see RRU Power Cable.

NEG(-) CPRI0

Optical port 0, connected to the BBU or an upper-level RRU

CPRI1

Optical port 1, connected to a lower-level RRU or the BBU

RUN

For details, see RRU Indicators.

ALM ACT VSWR CPRI0 CPRI1

 

NOTE: The port for transmitting RET signals is determined by the software. Connect the CPRI0 port to the BBU by default in the single-mode scenario.

Parent Topic: RRU Introduction Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.2.5 RRU Indicators This section describes six indicators on an RRU. They indicate the running status of the RRU. For detailed positions of RRU indicators, see RRU Ports.

Table 1

describes RRU indicators.

Table 1 RRU Indicators Indicator

Color

Status

Meaning

RUN

Green

Steady on

The power input is available, but the board is faulty.

Steady off

No power input is available, or the board is faulty.

Blinking (on for 1s The board is running properly. and off for 1s)

ALM

Red

Blinking (on for 0.125s and off for 0.125s)

The board software is being loaded, or the board is not working.

Steady on

Alarms are generated, and the module must be replaced.

Blinking (on for 1s Alarms are generated. The alarms may be and off for 1s) caused by faults on the related boards or ports. Therefore, you need to locate the fault before deciding whether to replace the module.

ACT

Green

Steady off

No alarms are generated.

Steady on

The board is working properly when TX channels are enabled or software is being loaded to a board that is not started.

Blinking (on for 1s The board is running with TX channels and off for 1s) disabled. VSWR

Red

Steady off

No voltage standing wave ratio (VSWR) alarm is generated.

Blinking (on for 1s VSWR alarms are generated on the B T/R or B and off for 1s) T port.

CPRI0

Steady on

VSWR alarms are generated on the A T/R or A T port.

Blinking (on for 0.125s and off for 0.125s)

VSWR alarms are generated on the A T/R and B T/R or A T and B T ports.

Steady green

The CPRI link is running properly.

Table 1 RRU Indicators Indicator

Color

Red and green

CPRI1

Red and green

Status

Meaning

Steady red

An optical module fails to receive or transmit signals possibly because the optical module is faulty or the optical fiber is broken.

Blinking red (on for The CPRI link is out of lock because of faults 1s and off for 1s) on the mutual lock of dual-mode clock sources or mismatched data rates on CPRI ports. Steady off

The optical module cannot be detected or is powered off.

Steady green

The CPRI link is running properly.

Steady red

An optical module fails to receive or transmit signals possibly because the optical module is faulty or the optical fiber is broken.

Blinking red (on for The CPRI link is out of lock because of faults 1s and off for 1s) on the mutual lock of dual-mode clock sources or mismatched data rates on CPRI ports. Steady off

The optical module cannot be detected or is powered off.

NOTE: VSWR indicators on RRUs providing one or more than two TX channels have two types of status:  

Steady off: No VSWR alarm is generated. Steady on: VSWR alarms are generated on one or more ports.

Parent Topic: RRU Introduction Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.2.6 Optical Modules An optical module transmits optical signals between an optical port and an optical fiber. Optical modules can be classified as single-mode and multimode optical modules, which can be distinguished as follows:



The puller of a single-mode optical module is blue and the puller of a multimode optical module is black or gray.



The transmission mode is displayed as "SM" on the label of a single-mode optical module and "MM" on the label of a multimode optical module.

Optical modules must be used in pairs on both ends of an optical fiber. The following table describes the mapping.

Each type of optical module has its own mapping. If different types of optical modules are used, performance risks may arise, for example, alarms, bit errors, and interrupted links. Table 1 Optical module mapping Optical Module Type

Mapping Between the BBU and RRU

SFP duplex (two-fiber bidirectional, duplex for short) optical module

SFP duplex optical modules with the same specifications are used on both sides.

SFP BIDI (single-fiber bidirectional, BIDI for short) optical module

SFP BIDI optical modules are used on both sides, or the DSFP optical module is used on the BBU side and the SFP BIDI optical module is used on the RRU side.  The receive and transmit wavelengths of an optical module on both sides have the mapping relationship. For example, if the receive and transmit wavelengths of the optical module on the BBU side are 1270TX/1330RX, those on the RRU side are 1330TX/1270RX.  Except for wavelengths, the specifications of optical modules are the same. For details about the DSFP optical module, see the hardware description of the corresponding BBU.

NOTE: The exterior and label on an optical module in this section are for reference only.  Boards or RF modules supporting only the 1.25 Gbit/s CPRI port rate, for example, a GTMU or RRU3908 V1, cannot use 10 Gbit/s optical modules.  Only Huawei-certified optical modules meeting the following requirements can be used for Huawei wireless devices:  Requirements of devices on which optical modules are to be installed  Laser safety requirements in the IEC 60825-1 standard  General safety requirements in the IEC 60950-1 standard 

 

For part numbers for Huawei Wireless certificated and provided SFP and QSFP optical modules, see Spare Parts Catalog. The supported maximum remote distance varies depending on the optical module. For details, see section "CPRI Fiber Optic Cable" in "Base Station Cables". CPRI fiber optic cables are configured based on application scenarios.

SFP Optical Module The following figure shows the exteriors of SFP optical modules. Figure 1 SFP optical modules

a: duplex optical module

b: BIDI optical module

There is a label on each optical module, which provides information such as the rate, wavelength, and transmission mode, as shown in the following figure. Figure 2 Label structure

(1) Rate

(2) Wavelength

Parent Topic: RRU Introduction Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topic

(3) Transmission mode

6.4.6.5.3 RRU Cables This chapter describes RRU cables. RRU Cable List

This section describes RRU cable connections. RRU PGND Cable

An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the RRU. The maximum length of an RRU PGND cable is 8 m (26.25 ft). RRU Power Cable

The RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RRU. The maximum length of power supply that an RRU power cable supports is 100 m (328.08 ft). CPRI Fiber Optic Cable

CPRI fiber optic cables are classified into multimode fiber optic cables and single-mode fiber optic cables. They transmit CPRI signals. RRU RF Jumper

The 1/2" RRU RF jumper transmits and receives RF signals between an RRU and an antenna. A fixed-length RF jumper used by an RRU is 2 m (6.56 ft), 3 m (9.84 ft), 4 m (13.12 ft), 6 m (19.68 ft), or 10 m (32.81 ft). A variable-length RF jumper used by an RRU has a maximum length of 10 m (32.81 ft). RRU AISG Multi-Wire Cable

An RRU AISG multi-wire cable connects an RRU and an RCU to transmit control signals from a base station to an RET antenna. When the RRU is connected to the RET antenna, an AISG multi-wire cable transmits RS485 signals. The length of the AISG multi-wire cable is 5 m (16.40 ft), 10 m (32.80 ft) or 20 m (65.60 ft). RRU AISG Extension Cable

When the distance between an RRU and an RCU exceeds 5 m (16.40 ft), the AISG multiwire cable with a length of 5 m (16.40 ft) is not long enough to connect the RRU and the RCU. In this case, an AISG extension cable is used to extend the AISG multi-wire cable for transmitting RS485 signals. The length of the AISG extension cable is 15 m (49.21 ft). Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd.

6.4.6.5.3.1 RRU Cable List This section describes RRU cable connections. Table 1

lists RRU cables.

Table 1 RRU cables Cable

One End Connector

The Other End Installation Position

Connector

Installation Position

RRU PGND Cable

OT terminal (M6, Ground terminal OT terminal (M8, Ground terminal 16 mm2 or 0.025 on the RRU 16 mm2 or 0.025 on the ground bar in.2) in.2)

RRU Power Cable

Female fast NEG(-) and Depending on the External power connector (pressfit RTN(+) ports on power supply equipment type) the RRU equipment

CPRI Fiber Optic Cable

DLC connector

 

CPRI0 port on the RRU CPRI1 port on the RRU

DLC connector





RRU RF Jumper

4.3-10 male connector

CPRI port on a board in the BBU or CPRI1 port on the upper-level RRU CPRI0 port on the lower-level RRU or CPRI port on a board in the BBU

RF ports on the 4.3-10 male Antenna system RRU connector or DIN male connector NOTICE: Select cables based on the type of the connector at the other end of the cable on live networks.

RRU AISG Multi-Wire Cable

DB9 waterproof male connector

RET port on the Standard AISG RRU female connector

Standard AISG male connector on the RCU or on the AISG extension cable

Table 1 RRU cables Cable

RRU AISG Extension Cable

One End

The Other End

Connector

Installation Position

Connector

Standard AISG male connector

Standard AISG Standard AISG female female connector connector on the AISG multiwire cable

Installation Position

Standard AISG male connector on the RCU

Parent Topic: RRU Cables Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. Next topic >

6.4.6.5.3.2 RRU PGND Cable An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the RRU. The maximum length of an RRU PGND cable is 8 m (26.25 ft).

Exterior A PGND cable is green or green and yellow with a cross-sectional area of 16 mm2 (0.025 in.2). An OT terminal is installed at each end of the cable. Figure 1 shows a PGND cable. Figure 1 PGND cable

(1) OT terminal (M6, 16 mm2 or 0.025 in.2)

  

(2) OT terminal (M8, 16 mm2 or 0.025 in.2)

NOTE: If the customer prepares the PGND cable, a copper-core cable with a cross-sectional area of 16 mm2 (0.025 in.2) or larger is recommended. One OT terminal must be added to each end of the PGND cable onsite. You can determine the color of the cable and whether to use corresponding two-hole OT terminals based on local regulations.

Figure 2

shows a two-hole OT terminal.

Figure 2 Two-hole OT terminal

Parent Topic: RRU Cables Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.3.3 RRU Power Cable The RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RRU. The maximum length of power supply that an RRU power cable supports is 100 m (328.08 ft). NOTE: If a power device provided by the customer is used, the recommended specification of the circuit breaker on this power device is 20 A to 30 A.

Exterior A female fast connector (pressfit type) needs to be added to one end of the RRU power cable and a corresponding terminal needs to be added to the other end based on the requirements of the connector on the external power device, as shown in Figure 1. Figure 1 RRU power cable

(1) -48 V DC power cable

(2) Shield layer

(3) Female fast connector (pressfit type)

The outer diameter of RRU power cables ranges from 9.9 mm to 14.4 mm, and Table 1 lists the specifications of an RRU power cable.

Table 1 Specifications of an RRU power cable RRU Type

National Standard

Remote Distance

Cross-Sectional Area of the Cable

OCB Quantity

RRU5901, RRU5901w, RRU3971a, RRU5301 (2.6G), RRU5301 (1.4G)

European standard

0 m to 70 m

4 mm2

0

71 m to 100 m

6 mm2

0

American standard

0 m to 100 m

5.3 mm2

0

NOTE: For power cables with the cross-sectional area of 10 mm2 complying with European standards, use OCB01M to connect the converted power cables to RRUs. For details about the structure, functions, installation, and maintenance of an OCB-01M, see OCB-01M User Guide. Table 2

lists the wire colors of an RRU power cable.

Table 2 Wire Colors of an RRU power cable Cable

RRU power cable

Wire

Wire Color in Most Regions

Wire Color in Other Regions

North American European Standard Standard

UK

China

RTN(+)

Black

Brown

Blue

Red

NEG(-)

Blue

Blue

Gray

Blue

Parent Topic: RRU Cables Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.3.4 CPRI Fiber Optic Cable CPRI fiber optic cables are classified into multimode fiber optic cables and single-mode fiber optic cables. They transmit CPRI signals. A multimode fiber optic cable connects a BBU to an RRU or connects two RRUs. The maximum length of a multimode fiber optic cable connecting a BBU and an RRU is 150 m (492.12 ft). The

default length of a multimode fiber optic cable connecting two RRUs is 10 m (32.81 ft). If the distance between two RRUs exceeds 10 m (32.81 ft), contact Huawei engineers. The single-mode fiber optic cable can be divided into two types: single-mode fiber optic cable directly connecting a BBU to an RRU or connecting two RRUs (shortened to directly connected single-mode fiber optic cable) and single-mode fiber optic cable connecting an ODF to a BBU or RRU (shortened to single-mode pigtail). The length of the directly connected single-mode fiber optic cable cannot exceed the maximum allowed remote distance between the BBU and RRU. The maximum length of the single-mode pigtail between an ODF and a BBU is 20 m (65.62 ft). The maximum length of the single-mode pigtail between an ODF and an RRU is 70 m (229.66 ft).

  

NOTE: The ODF is an outdoor transfer box for fiber optic cables, which interconnects the single-mode pigtail and trunk single-mode fiber optic cable. The ODF and trunk single-mode fiber optic cable are provided by the customer and must comply with the ITU-T G.652 standard. A multimode fiber optic cable is used together with a multimode optical module, and a single-mode pigtail is used together with a single-mode optical module.

Selection Principle The following table lists the principles for selecting CPRI fiber optic cables. Table 1 Principles for selecting CPRI fiber optic cables Remote Distance of Fiber Optic Cablesa

CPRI Data Rate (Gbit/s) of the Optical Module

Selection Principle

≤ 150 m 2.5 to 6.144 Multimode fiber optic (492.12 ft) cable/Directly connected single-mode fiber optic cable 9.8 to 25

150 m to 10 km (492.12 ft to 32808.40 ft)

Connects...to...

Description

Connects a BBU to an RRU or AAU, or connects two RRUs or AAUs

When multiple RRUs or AAUs are cascaded, multimode fiber optic cables and single-mode fiber optic cables can be used together.

Connects a BBU to an RRU or AAU, or connects two RRUs or AAUs

The single-mode pigtail at the RRU/AAU or BBU side is connected to the trunk single-mode

Directly connected single-mode fiber optic cable Single-mode fiber optic cable (single-mode pigtail and trunk singlemode fiber optic cable)

Table 1 Principles for selecting CPRI fiber optic cables Remote Distance of Fiber Optic Cablesa

CPRI Data Rate (Gbit/s) of the Optical Module

Selection Principle

Connects...to...

Description

fiber optic cable by using an ODF. ≤ 70 m 40/100 (229.66 ft)

OM3 multimode fiber optic cable

70 m to 40/100 100 m (229.66 ft to 328.08 ft)

OM4 multimode fiber optic cable

100 m to 40/100 10 km (328.08 ft to 32808.40 ft)

Single-mode fiber optic cable (single-mode pigtail and trunk singlemode fiber optic cable)

Connects a BBU to an AAU

Short-distance connection between the BBU and AAU

Connects a BBU to an RRU or AAU, or connects two RRUs or AAUs

The single-mode pigtail at the RRU/AAU or BBU side is connected to the trunk single-mode fiber optic cable by using an ODF.

a: The remote distance of fiber optic cables is the distance between the BBU and the first RRU or AAU or the distance between two RRUs or AAUs.

Exterior Multimode fiber optic cable or directly connected single-mode fiber optic cable: It can be a dual-core fiber optic cable with DLC connectors as shown in Figure 1 or a single-core fiber optic cable with LC connectors as shown in Figure 2. Figure 1 Exterior of the dual-core fiber optic cable with DLC connectors

(1) DLC connector

(2) Breakout cable

(3) Label on the breakout cable

Figure 2 Exterior of the single-core fiber optic cable with LC connectors

(1) LC connector

  

NOTE: When a fiber optic cable connects a BBU3900/BBU3910/BBU5900 to an RRU, the breakout cables on the BBU side and on the RRU side are 0.34 m (1.12 ft) and 0.03 m (0.098 ft), respectively. When a fiber optic cable connects a BBU3910A/BBU3910C to an RRU, the breakout cables on the BBU side and the RRU side are both 0.03 m (0.098 ft). When a fiber optic cable connects two RRUs, the breakout cables on both sides are 0.03 m (0.098 ft).

The following figure shows the connection of the multimode fiber optic cable or directly connected single-mode fiber optic cable between a BBU and an RRU as an example. Figure 3 Connection of the multimode fiber optic cable or directly connected single-mode fiber optic cable between a BBU and an RRU

(1) Multimode fiber optic cable or directly connected single-mode fiber optic cable between a BBU and an RRU OFD06 trunk fiber optic cable: It connects a BBU to an OFD06 and has 12 LC connectors at each end, as shown in the following figure.

Figure 4 OFD06 trunk fiber optic cable

(1) LC connector

(2) Breakout cable

(3) Label on the breakout cable

Single-mode pigtail: It has a DLC connector at one end and an FC, LC, or SC connector at the other end, as shown in the following figure. Figure 5 Exterior of a single-mode pigtail

(1) DLC connector



(2) Breakout cable

(3) Label on the breakout cable

(4) FC connector

(5) LC connector

(6) SC connector

NOTE: When a single-mode pigtail connects a BBU to an ODF, the breakout cables on the BBU side and ODF side are 0.34 m (1.12 ft) and 0.8 m (2.62 ft), respectively.



When a single-mode pigtail connects an RRU to an ODF, the breakout cables on the RRU side and ODF side are 0.03 m (0.098 ft) and 0.8 m (2.62 ft), respectively.

The following figure shows the connection of a single-mode pigtail. Figure 6 Connection of the single-mode pigtail

(1) Single-mode pigtail between a BBU and an (2) Single-mode pigtail between an RRU and an ODF ODF The OM3 and OM4 multimode fiber optic cables have the same exterior. Each end of such a cable has an MPO connector. The MPO connector with a strap connects to the BBU and the MPO connector without a strap connects to the AAU, as shown in the following figure. Figure 7 OM3/OM4 multimode fiber optic cable

(1) MPO connector

(2) Strap

(3) MPO connector

Pin Assignment The following table describes the labels on the breakout cables of a CPRI fiber optic cable and recommended cable connections.

Table 2 Labels on the breakout cables of a CPRI fiber optic cable Label on the Breakout Cable

Installation Position Connection Between a BBU and an RRU or Between an OFD06 and an RRU

Connection Between RRUs

1A

CPRI RX port on the RRU

CPRI RX port on RRU RX port on the BBU or 1 CPRI RX port on the RRU

1B

CPRI TX port on the RRU

CPRI TX port on RRU TX port on the BBU or 1 CPRI TX port on the RRU

2A

OFD06 or TX port on the BBU

CPRI TX port on RRU ODF 0

2B

OFD06 or RX port on the BBU

CPRI RX port on RRU ODF 0

Connection Between a BBU or RRU and an ODF

Parent Topic: RRU Cables Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.3.5 RRU RF Jumper The 1/2" RRU RF jumper transmits and receives RF signals between an RRU and an antenna. A fixed-length RF jumper used by an RRU is 2 m (6.56 ft), 3 m (9.84 ft), 4 m (13.12 ft), 6 m (19.68 ft), or 10 m (32.81 ft). A variable-length RF jumper used by an RRU has a maximum length of 10 m (32.81 ft).







NOTE: When the distance between an RRU and an antenna is less than 10 m (32.81 ft), one end of the RF jumper is connected to an RF port at the bottom of the RRU, and the other end is connected to the antenna. When the distance between an RRU and an antenna is greater than 10 m (32.81 ft), it is recommended that one end of the RF jumper be connected to an RF port at the bottom of the RRU, the other end be connected to one end of the feeder, and the other end of the feeder be connected to the antenna. If the customer prepares the RF jumper, the length of the RF jumper should be as short as possible and not exceed 2 m (6.56 ft.).

Exterior For an RF jumper, one end is connected to a 4.3-10 male connector, and the other end is connected to a connector based on onsite requirements, which is a 4.3-10 male connector or DIN male connector. Figure 1

shows an RF jumper with two ends connected to 4.3-10 male connectors.

Figure 1 RF jumper

(1) 4.3-10 male connector Parent Topic: RRU Cables Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.3.6 RRU AISG Multi-Wire Cable An RRU AISG multi-wire cable connects an RRU and an RCU to transmit control signals from a base station to an RET antenna. When the RRU is connected to the RET antenna, an AISG multi-wire cable transmits RS485 signals. The length of the AISG multi-wire cable is 5 m (16.40 ft), 10 m (32.80 ft) or 20 m (65.60 ft). NOTE: An RCU is a driving motor used for the phase shifter in the RET antenna. It receives control commands from a base station and runs the commands to drive the stepper motor. Using a gear, the stepper motor drives the adjustable phase shifter in the antenna and changes the downtilt angle.

Exterior An AISG multi-wire cable has a waterproof DB9 male connector at one end and a standard AISG female connector at the other end, as shown in Figure 1 or Figure 2.

Figure 1 AISG multi-wire cable (1)

(1) Waterproofed DB9 male connector

(2) Standard AISG female connector

Figure 2 AISG multi-wire cable (2)

(1) Waterproofed DB9 male connector

(2) Standard AISG female connector

Pin Assignment Table 1

describes the pin assignment for the wires of an AISG multi-wire cable.

Table 1 Pin assignment for the wires of an AISG multi-wire cable X1 End (Pin of the Waterproofed DB9 Male Connector)

X1.1

X2 End (Pin of the Standard AISG Female Connector)

X2.1

Color

Description

Type

White and blue

+12 V

Twisted pair

Blue X1.3

X2.3

White and orange

RS485 B Twisted pair

X1.5

X2.5

Orange

RS485 A

X1.4

X2.4

White and green

GND

-

Table 1 Pin assignment for the wires of an AISG multi-wire cable X1 End (Pin of the Waterproofed DB9 Male Connector)

X2 End (Pin of the Standard AISG Female Connector)

Color

Description

Type

X1.9 and X1.4 are interconnected.

-

-

GND

-

-

X2.1 and X2.6 are interconnected.

-

+12 V

-

-

X2.4 and X2.7 are interconnected.

-

GND

-

Parent Topic: RRU Cables Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topicNext topic >

6.4.6.5.3.7 RRU AISG Extension Cable When the distance between an RRU and an RCU exceeds 5 m (16.40 ft), the AISG multi-wire cable with a length of 5 m (16.40 ft) is not long enough to connect the RRU and the RCU. In this case, an AISG extension cable is used to extend the AISG multi-wire cable for transmitting RS485 signals. The length of the AISG extension cable is 15 m (49.21 ft).

 

NOTE: The AISG extension cable can be used only when the AISG multi-wire cable with a length of 5 m (16.40 ft) is used. If the distance between an RRU and an RCU exceeds 5 m (16.40 ft), the multi-wire cable with a length of 10 m (32.81 ft) or 20 m (65.62 ft) is preferred, and connecting them with the AISG multi-wire cable and the AISG extension cable is only a backup solution.

Exterior An AISG multi-wire cable has a standard AISG male connector at one end and a standard AISG female connector at the other end, as shown in Figure 1.

Figure 1 AISG extension cable

(1) Standard AISG male connector

(2) Standard AISG female connector

Pin Assignment Table 1

describes the pin assignment for the wires of an AISG extension cable.

Table 1 Pin assignment for the wires of an AISG extension cable X1 End (Pin of the Standard AISG Male Connector)

X2 End (Pin of the Standard AISG Female Connector)

Color

Description

Type

X1.1

X2.1

White and blue

+12 V

Twisted pair

DC Return

Twisted pair

Twisted pair

Blue X1.7

X2.7

White and orange Orange

X1.3

X2.3

White and green

RS485 B

X1.5

X2.5

Green

RS485 A

X1.6

X2.6

White and brown

+24 V

Brown Parent Topic: RRU Cables Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd. < Previous topic

Twisted pair

6.4.6.5.4 RF Cable Connections for the RRU5901&RRU5901w&RRU5301 (2.6G)&RRU5301 (1.4G)&RRU3971a RF cable connections for the RRU vary depending on the configurations of the RRU and antenna.

Description of RF Cable Connections This section describes the RF cable connections for the RRU serving a single sector. The following tables list the RF cable connections for the RRU. Table 1 RF cable connections for the RRU RRU Model

Specifications of a Single RRU

RRU5901, RRU5901w, RRU5301 (2.6G), RRU5301 (1.4G), RRU3971a

For details, see the 1T1R+1T1R+1T1R+1T1R typical power configuration of the 2T2R corresponding 2T2R+2T2R RRU in RRU Technical  2T4R Specifications.  4T4R

Illustration of Cable Connections

Scenario

Illustration of Cable Connections

See illustration 1 in Figure 1. See illustration 2 in Figure 1. See illustration 3 in Figure 1. See illustration 4 in Figure 1.

Figure 1 RF cable connections for the RRU

Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd.

6.4.6.5.5 RRU Auxiliary Devices This chapter describes RRU auxiliary devices.

Indoor Floor installation Support An Indoor Floor installation Support (IFS06) is used for installing indoor RRUs. For details about the exterior, specifications, and installation of an IFS06, see the Base Station Hardware Description and DBS3900 (ICR) Installation Guide.

Outdoor Pole Support OFP06, short for Outdoor Flexible Pole For 6, is an outdoor pole support and provides a solution for extended installation of Huawei products on towers or building tops. For details about the exterior and installation of an OFP06, see the OFP06 Installation Guide.

OCB An Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters. Power cables shipped with RRUs cannot support long-distance power supply. Therefore, when

power supply is far from the equipment, cables with large core diameters are used, and an OCB connects these cables and RRU power cables. For details about the structure, functions, installation, and maintenance of an OCB, see the OCB User Guide or OCB–01M User Guide.

Power Module Power module is used to convert external AC input power into -48 V DC for the DC RRU, including the following type: 

OPM15M(Ver.B): supported by V100R010C10 and later.



OPM50M(Ver.B): supported by V100R010C10 and later.

For details about the structure, functions, installation, and maintenance of a Power Module, see the OPM15M(Ver.B) User Guide or OPM50M(Ver.B) User Guide.

Distribution Equipment The ODM03D is small distribution equipment, which supports RRU capacity expansion, power cable reuse, and fiber optic cable reuse. For details about the structure, functions, installation, and maintenance of an ODM03D, see the ODM03D User Guide.

RMU A RMU3900A (Outdoor Distribution Module) is a radio multiplex unit, which converges and deconverges CPRI data and saves CPRI fiber optic cables between a BBU and RRUs. RMU3900A: supported by V100R012C00 and later. For details about the structure, functions, installation, and maintenance of a RMU3900A, see the RMU3900A User Guide.

MEB The Monitoring Extension Box (MEB) can convert external RS-485 communication signals and dry node alarm signals into power return circuit signals, implementing power supply monitoring. MEB: supported by V100R010C10 and later. For details about the structure, functions, installation, and maintenance of a MEB, see the MEB06D User Guide. Copyright © Huawei Technologies Co., Ltd. Copyright © Huawei Technologies Co., Ltd.